Curated Sass Resources
Installing SASS:
http://sass-lang.com/install (Ruby)
https://www.npmjs.com/package/node-sass (C)
https://www.npmjs.com/package/grunt-sass (To use with grunt)
https://github.com/jtangelder/sass-loader (Webpack)
Basics:
Testing/Sandbox SASS:
How to structure a SASS project:
http://thesassway.com/beginner/how-to-structure-a-sass-project
SASS Styleguides:
https://css-tricks.com/sass-style-guide/
https://github.com/airbnb/css
http://sass-lang.com/styleguide
http://sass-guidelin.es/
Choose good variable names:
http://thesassway.com/beginner/variable-naming
Difference between mixin, extend, and placeholders:
http://krasimirtsonev.com/blog/article/SASS-mixins-extends-and-placeholders-differences-use-cases
Functions!
http://thesassway.com/advanced/pure-sass-functions
https://www.sitepoint.com/sass-basics-function-directive/
Naming your media queries:
https://css-tricks.com/naming-media-queries/
High level concepts:
http://alistapart.com/article/a-vision-for-our-sass
General Resources:
http://thesassway.com/
https://css-tricks.com/
https://css-tricks.com/snippets/sass/